/// <summary>
/// Pass the 'inStream' through exiftool and write the output to the 'outStream'.
/// </summary>
private void ReadTemporaryFile(Stream file)
{
// get a buffer
byte[] buffer = BufferCache.Get();
// read from the stream
int count = file.Read(buffer, 0, Global.BufferSizeLocal);
// write the buffer to the output stream
Output.Write(buffer, 0, count);
// is this the final buffer?
if (count < Global.BufferSizeLocal)
{
// yes, dispose of the file stream
file.Dispose();
// reset the buffer
BufferCache.Set(buffer);
Success = true;
// run callback
OnComplete.Run();
// should the file be removed?
if (_removeTempFile)
{
ManagerResources.RemoveFile(Path);
}
}
else
{
// no, reset the buffer
BufferCache.Set(buffer);
// add a task to clear the metadata
ManagerUpdate.Control.AddSingle(ReadTemporaryFile, file);
}
}
/// <summary>
/// Run the medadata removal process.
/// </summary>
public void Run()
{
bool found = false;
if (_coordinator.Buffer != null)
{
while (_coordinator.BufferIndex < _coordinator.BufferCount)
{
if (_coordinator.ReadySearch.Next(_coordinator.Buffer[_coordinator.BufferIndex]))
{
++_coordinator.BufferIndex;
found = true;
break;
}
++_coordinator.BufferIndex;
}
if (_coordinator.BufferIndex == _coordinator.BufferCount)
{
_coordinator.Buffer = null;
}
}
if (!found)
{
// read the {ready} flag from the exiftool
var buffer = BufferCache.Get();
var process = _coordinator.Process.TakeItem();
int count = process.StandardOutput.BaseStream.Read(buffer, 0, Global.BufferSizeLocal);
// while there are bytes in the process standard output
while (count > 0)
{
int index = 0;
while (index < count)
{
// check the buffer for the {ready} flag
if (_coordinator.ReadySearch.Next(buffer[index]))
{
++index;
// are there bytes in the buffer?
if (index == count)
{
// no, persist the buffer
BufferCache.Set(buffer);
}
else
{
// yes, remember the buffer and position
_coordinator.Buffer = buffer;
_coordinator.BufferIndex = index;
_coordinator.BufferCount = count;
}
found = true;
break;
}
++index;
}
if (found)
{
break;
}
count = process.StandardOutput.BaseStream.Read(buffer, 0, Global.BufferSizeLocal);
}
_coordinator.Process.Release();
}
// should the file be read?
if (Output == null)
{
// no, run callback
OnComplete.Run();
// should the file be removed?
if (_removeTempFile)
{
ManagerResources.RemoveFile(Path);
}
return;
}
FileStream fileStream;
try {
fileStream = new FileStream(Path, FileMode.Open, FileAccess.Read, FileShare.Read);
} catch (IOException ex) {
// if the file is still being used
if (ex.HResult == -2147024864)
{
// try twice more
ManagerUpdate.Iterant.AddSingle(TryReadTemporaryFile, 0);
return;
}
throw;
}
// get a stream to the clean file
ManagerUpdate.Control.AddSingle(ReadTemporaryFile, fileStream);
}
/// <summary>
/// Run the medadata removal process.
/// </summary>
public void Run()
{
var stream = new ByteBuffer(new MemoryStream());
bool found = false;
if (_coordinator.Buffer != null)
{
while (_coordinator.BufferIndex < _coordinator.BufferCount)
{
var bit = _coordinator.Buffer[_coordinator.BufferIndex];
stream.Write(bit);
++_coordinator.BufferIndex;
if (_coordinator.ReadySearch.Next(bit))
{
found = true;
break;
}
}
if (_coordinator.BufferIndex == _coordinator.BufferCount)
{
_coordinator.Buffer = null;
}
}
if (!found)
{
// read the {ready} flag from the exiftool
var buffer = BufferCache.Get();
var process = _coordinator.Process.TakeItem();
int count = process.StandardOutput.BaseStream.Read(buffer, 0, Global.BufferSizeLocal);
// while there are bytes in the process standard output
while (count > 0)
{
int index = 0;
while (index < count)
{
// check the buffer for the {ready} flag
var bit = buffer[index];
stream.Write(bit);
++index;
if (_coordinator.ReadySearch.Next(bit))
{
// the flag has been found - are there bytes in the buffer?
if (index == count)
{
BufferCache.Set(buffer);
}
else
{
// yes, remember the buffer
_coordinator.Buffer = buffer;
_coordinator.BufferIndex = index;
_coordinator.BufferCount = count;
}
found = true;
break;
}
}
if (found)
{
break;
}
count = process.StandardOutput.BaseStream.Read(buffer, 0, Global.BufferSizeLocal);
}
_coordinator.Process.Release();
}
// should the file be removed?
if (_removeTempFile)
{
ManagerResources.RemoveFile(Path);
}
// reset the stream position
stream.Position = 0;
// create the metadata dictionary for the callback
Metadata = new Dictionary <MetaKey, string>();
// while there are more bytes to read
while (stream.Position < stream.WriteEnd)
{
string key;
try {
// read the key of the key value pair
key = stream.ReadString(Chars.Colon);
} catch {
// ignore and break
break;
}
// trim the key
key = key.TrimSpace();
// no, read the value of the key-value pair
var value = stream.ReadString(Chars.NewLine).TrimSpace();
if (string.IsNullOrEmpty(key) || string.IsNullOrEmpty(value))
{
Log.Debug("Missing metadata '" + key + "' : '" + value + "'.");
continue;
}
// parse the key and assign key-value pair
MetaKey metaKey;
if (MetaKeys.Map.TryGetValue(key, out metaKey))
{
// determine how to parse the metadata value
switch (metaKey)
{
case MetaKey.FileSize:
{
// determine the scale of the file size
var splitFileSize = value.Split(value.IndexOf(Chars.Space));
switch (splitFileSize.ArgB)
{
case "bytes":
Metadata[metaKey] = splitFileSize.ArgA;
break;
case "MB":
Metadata[metaKey] = ((int)(splitFileSize.ArgA.ToDouble() * Global.Megabyte)).ToString();
break;
case "kB":
Metadata[metaKey] = ((int)(splitFileSize.ArgA.ToDouble() * Global.Kilobyte)).ToString();
break;
case "GB":
Metadata[metaKey] = ((int)(splitFileSize.ArgA.ToDouble() * Global.Gigabyte)).ToString();
break;
default:
Log.Error("Unknown file size scale of media '" + value + "'.");
break;
}
}
break;
case MetaKey.Duration:
{
// check for (approx) suffix
int index = value.IndexOf(Chars.Space);
if (index != -1)
{
value = value.Substring(0, index);
}
var splitDuration = value.Split(Chars.Colon);
// determine the type of duration
if (splitDuration.Length == 1)
{
Metadata[metaKey] = ((int)(splitDuration[0].ToDouble() * 1000)).ToString();
}
else
{
// parse each component
int time = splitDuration[0].ToInt32() * 60 * 60 * 1000;
time += splitDuration[1].ToInt32() * 60 * 1000;
time += splitDuration[2].ToInt32() * 1000;
// assign the time value
Metadata[metaKey] = time.ToString();
}
}
break;
case MetaKey.Bitrate:
{
// determine the scale of the file size
var splitBitrate = value.Split(value.IndexOf(Chars.Space));
switch (splitBitrate.ArgB)
{
case "bps":
Metadata[metaKey] = splitBitrate.ArgA;
break;
case "kbps":
Metadata[metaKey] = ((int)(splitBitrate.ArgA.ToDouble() * Global.Kilobyte)).ToString();
break;
case "Mbps":
Metadata[metaKey] = ((int)(splitBitrate.ArgA.ToDouble() * Global.Megabyte)).ToString();
break;
default:
Log.Warning("Unknown bitrate scale of media '" + value + "'.");
break;
}
}
break;
default:
// assign the mime type directly
Metadata[metaKey] = value;
break;
}
}
else
{
Log.Warning("Unrecognized metadata key '" + key + " : " + value + "'.");
}
}
// dispose of the byte stream
stream.Close();
// run callback
OnComplete.Run();
}
